None, no gas is given off.
Cyanoacrylate gas is given off.
Carbon dioxide is the gas given off. Oil also gives off the same gas when burned.
hydrogen eg:Na+HCl------>NaCl+H2
Carbon Dioxide is given off. (CO2)
Hydrogen gas.
Oxygen gas
When you place a lighted splint into, say, a test tube, where you suspect hydrogen gas is being given off, a 'pop' sound indicates the presence of the gas.
Oxygen is given of
Oxygen
smoke
Oxygen.